<template>
  <div class="my-tab-bar">
   
  	<div class="tab-item"
     v-for="(obj ,index) in arr" :key="index"
     :class= "{current :activeIndex===index}"
     @click="btn(index ,obj)"
     
      >
      <!-- 图标 -->
      <span class="iconfont" :class="obj.iconText"></span>
      
      <!-- 文字 -->
      <span>{{obj.text}}</span>
    </div>
  </div>
</template>

<script>
export default {
  props:{
    arr:{
      type:Array,
      required:true,
      // 自定义校验规则
      validator(val){
        if(val.length>=2&&val.length<=5){
          return true
        } else{
          console.error('数据源必须在2-5项');
          return false
        }
      }
    }
  },
  data(){
    return{
      activeIndex:0 //定义全局变量
    }
  },
  methods:{
    btn(index,theObje){
      this.activeIndex = index
      // 把当前点击的组件名字传给父组件
      this.$emit("changeCom",theObje.componentName )
  
    
    }
  }
}
</script>

<style lang="less" scoped>
.my-tab-bar {
  position: fixed;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 50px;
  border-top: 1px solid #ccc;
  display: flex;
  justify-content: space-around;
  align-items: center;
  background-color: white;
  .tab-item {
    display: flex;
    flex-direction: column;
    align-items: center;
  }
}
    
.current {
  color: #1d7bff;
}
</style>